package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.entity.Dish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetMealMapper setmealMapper;

    /**
     * 分页查询分类
     *
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        //使用工具指定开始页长度
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());
        //调用持久层mapper
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        //
        long total = page.getTotal();
        List<Category> records = page.getResult();
        return new PageResult(total, records);
    }

    /**
     * 修改分类
     *
     * @param categoryDTO
     */
    @Override
    public void updateMessage(CategoryDTO categoryDTO) {
        Category category = new Category();
        //拷贝相同数据
        BeanUtils.copyProperties(categoryDTO, category);
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);
    }

    /**
     * 启用、禁用分类
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category = Category.builder()
                .status(status)
                .id(id)
//                .updateTime(LocalDateTime.now())
//                .updateUser(BaseContext.getCurrentId())
                .build();

        categoryMapper.update(category);
    }

    /**
     *  新增分类
     * @param categoryDTO
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        //拷贝相同数据
        BeanUtils.copyProperties(categoryDTO, category);
        //设置默认属性
        category.setStatus(0);
//        category.setCreateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);
    }

    /**
     * 根据id删除分类
     * @param id
     */
    @Override
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Dish dish = Dish.builder()
                .categoryId(id)
                .build();
        List<Dish> list  = dishMapper.list(dish);
        //
        if(list.size() > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }


        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        int  count = setmealMapper.countByCategoryId(id);
        if(count > 0) {
            //当前分类下有菜品，不能删除
            throw  new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }


        //删除分类数据
        categoryMapper.deleteById(id);
    }

    @Override
    public List<Category> list(Integer type) {

       List<Category> list =  categoryMapper.list(type);
        return list;
    }
}
